Metering precision testing device for oiling machine

Abstract

The invention provides an oiling machine metering precision testing device, and relates to the technical field of volume measurement, the oiling machine metering precision testing device comprises a first testing tank body, a second testing tank body, a connecting channel, an output pipeline and an oiling machine pipeline, one side of the bottom of the first testing tank body is provided with the connecting channel, and the other end of the connecting channel is provided with the second testing tank body; according to the invention, in the testing process, air in the first testing tank body can be blown out upwards from the top end of the static testing assembly, the stable state of discharged air flow can be obtained, and the stability of the static testing assembly is improved. Therefore, in the volume metering process, the flow velocity stability of the oil injected into the oiling machine pipeline is indirectly and synchronously measured and obtained, the test is more comprehensive, stable reading can be always achieved in the test process, and continuous test processing on the volume in the long-time flowing oiling process is also achieved in cooperation with a pressure sensor.

Description

Technical Field

[0001] This invention relates to the field of volume measurement technology, and in particular to a fuel dispenser metering accuracy testing device. Background Technology

[0002] Metering accuracy testing of fuel dispensers involves using high-precision sensors to measure the volume of flowing fuel, ensuring the fairness and accuracy of fuel trade settlements. This directly protects consumers' legitimate rights, prevents economic losses due to measurement errors, and maintains the fairness and transparency of market transactions. Furthermore, it serves as a crucial basis for national metrological supervision, ensuring tax integrity, and facilitating administrative enforcement. The metering accuracy test employs a volume comparison method: comparing the displayed volume value on the dispenser with the actual standard volume value obtained after temperature correction and filling a standard container, calculates the indication error. The entire testing process must strictly adhere to regulations, controlling environmental and oil temperature conditions. Key components such as the control board, encoder, and flow meter must be inspected and sealed to prevent cheating. Finally, the dispenser's qualification is determined based on the allowable error range.

[0003] In existing technologies, conventional fuel dispenser metering equipment relies on single static metering for large-volume oil discharge metering tasks. This fails to assess the uniformity of oil flow rate within the refueling pipeline while measuring volume, resulting in insufficient monitoring of key parameters in the dynamic process. Furthermore, the metering mechanism is often fixed or susceptible to shaking interference during testing, leading to poor reading stability and affecting the reliability and accuracy of the metering. In addition, conventional devices lack effective dynamic simulation and continuous monitoring capabilities, making it difficult to stably discharge injected oil at a set flow rate and conduct long-term continuous testing. Consequently, they cannot comprehensively reflect the long-term stability of flow rate and volume measurement accuracy during actual refueling, resulting in a relatively singular testing dimension. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the purpose of this invention is to provide a fuel dispenser metering accuracy testing device. During the testing process, this invention can blow air from the top of the static testing component upwards from the inside of the first testing tank to obtain the stability of the exhaust airflow. This allows for the indirect measurement and acquisition of the stability of the flow rate of the fuel dispenser pipeline during the volume metering process. The testing is more comprehensive, and the readings are always stable during the testing process. In conjunction with a pressure sensor, it also enables continuous testing of the volume during a long-term flow refueling process.

[0006] To achieve the above objectives, the present invention provides a fuel dispenser metering accuracy testing device. The accuracy testing device includes: a first test tank, a second test tank, a connecting channel, an output pipe, and a fuel dispenser pipe. The first test tank has a connecting channel on one side of its bottom, and the second test tank is located at the other end of the connecting channel. The interiors of the first test tank, the second test tank, and the connecting channel are all interconnected. The bottom of the connecting channel has an output pipe, and the top of the first test tank has a fuel dispenser pipe for connecting to a fuel dispenser device. The output pipe is used to discharge the oil inside the first test tank, the second test tank, and the connecting channel. The accuracy testing device further includes: a static stability testing component, a dynamic stability testing component, and a measuring mechanism. The measuring mechanism is installed inside the second test tank. The top of the measuring mechanism is equipped with a dynamic stability testing component. The top of the second test tank is equipped with a static stability testing component, which is used to discharge the air inside the second test tank to the outside.

[0007] Furthermore, the top of the second test tank is provided with a first lifting hole, a second lifting hole, and a marking line. The top of the second test tank is engraved with a marking line, and the top of the second test tank is also provided with a first lifting hole and a second lifting hole. The end of the marking line is connected to the side of the first lifting hole. Both the first lifting hole and the second lifting hole are used for the top of the measuring mechanism to pass through the top of the second test tank upwards.

[0008] Furthermore, the bottom of the connecting channel is provided with an output pipe, a sinking channel and a regulating valve. The top of the sinking channel is provided with an opening, and the sinking channel is connected to the interior of the connecting channel through the opening at the top. The front end of the sinking channel is connected to the output pipe, and a regulating valve is installed on the surface of the output pipe. The regulating valve is used to control the flow rate of the oil inside the output pipe.

[0009] Furthermore, the measuring device includes: The floating plate includes an indicator rod, scale lines, and a lifting rod. The top of the floating plate is equipped with an indicator rod and a lifting rod. A dynamic stability test component is fitted onto the surface of the lifting rod. Scale lines are printed on the surface of the indicator rod. The indicator rod extends upward from the inside of the first lifting hole. The marking line is used to align with the scale lines. The lifting rod is used to extend upward from the inside of the second lifting hole, and both the indicator rod and the top of the lifting rod are provided with an outwardly protruding limiting structure. The floating plate is rectangular in shape, and the side of the floating plate is attached to the inner wall of the second test tank. The floating plate floats on the bottom oil.

[0010] Furthermore, the dynamic stability testing component includes: The magnetic sleeve, locking knob, and linkage plate are integrated into the side of the magnetic sleeve. The locking knob is inserted into the side of the magnetic sleeve. The magnetic sleeve is fitted onto the surface of the lifting rod. The end of the locking knob is used to abut against the surface of the lifting rod. The inner wall of the magnetic sleeve is attracted and adhered to the surface of the lifting rod.

[0011] Furthermore, the dynamic stability testing component also includes: The system includes a column, a spring, a limit baffle, and a pressure sensor. The pressure sensor is mounted on the top of the column, and the limit baffle is set on the top of the pressure sensor. A spring is fitted on the surface of the column, and the top of the spring rests against the bottom of the pressure sensor. The bottom of the spring is welded and fixed to the surface of the linkage plate. The bottom of the column is fixed to the surface of the second test tank, and the column and the lifting rod are kept parallel to each other.

[0012] Furthermore, the lifting rod drives the magnetic sleeve to move up and down synchronously through the magnetic attraction effect or the locking effect of the locking knob. The magnetic sleeve, together with the linkage plate, is used to control the spring to compress or stretch. The spring applies pressure or pulls on the pressure sensor part through its own compression or extension.

[0013] Furthermore, the static stability test component includes: The system includes a fixed pipe, a positioning component, and a lifting sleeve. The fixed pipe is installed at the top of the second test tank. A lifting sleeve is fitted onto the top of the fixed pipe. A positioning component is installed on the side of the fixed pipe. The positioning component is in contact with the surface of the fixed pipe. There are two positioning components, which are located on both sides of the fixed pipe and have different heights. The fixed pipe has grooves on both sides, magnetic convex plates integrally formed on the side of the fixed pipe, and an air vent at the top of the fixed pipe. The grooves are symmetrically arranged on both sides of the fixed pipe, and the magnetic convex plates are used to provide support and adsorption for the lifting sleeve.

[0014] Furthermore, the positioning component includes: The device comprises a lifting plate, a connecting plate, a conductive sheet, a threaded sleeve, and a threaded rod. One end of the lifting plate is integrally formed with a connecting plate, and a conductive sheet is provided on the top of the connecting plate. A threaded sleeve is formed on the surface of the lifting plate, and a threaded rod is inserted into the inner side of the threaded sleeve. The lifting plate and the connecting plate are kept perpendicular to each other. The conductive sheet has an overall arc-shaped structure and moves up and down along the inside of the sliding groove. The bottom end of the threaded rod is movably connected to the surface of the second test tank through a bearing.

[0015] Furthermore, the surface of the lifting sleeve is provided with docking holes, and a conductive ring is embedded in the inner wall of the lifting sleeve. The docking holes are evenly distributed around the surface of the lifting sleeve. The bottom of the lifting sleeve is in an open state, and the top of the lifting sleeve is in a closed state. The conductive ring is used to contact two conductive plates, and the fixed pipe is used to guide the air inside the second test tank toward the air outlet and the docking holes.

[0016] The technical solution provided by this invention may include the following beneficial effects: 1. This fuel dispenser metering accuracy testing device, through the setting of a first test tank and a second test tank, in conjunction with the static test component on the top, can blow the air inside the first test tank upwards from the top of the static test component during the test. Through the set conductive structure, the stability of the exhaust airflow can be obtained, thereby indirectly measuring and obtaining the stability of the flow rate of the fuel injected into the fuel dispenser pipeline during the volume metering process, making the test more comprehensive.

[0017] 2. The fuel dispenser metering accuracy testing device uses the first and second test tanks to drive the inner metering mechanism to move up and down. During the up and down movement, the volume of injected oil can be measured by the indicator rod on the top. The test process can always read the value stably, reducing the shaking amplitude and making the metering process more reliable and accurate.

[0018] 3. The fuel dispenser metering accuracy testing device is equipped with a dynamic testing component at the top of the metering mechanism. Together with the output pipe and regulating valve at the bottom, it can directly set the injected oil to the same inflow speed for discharge. At this time, it can still determine whether the current oil injection speed of the fuel dispenser is always stable through the dynamic stability testing component, thereby realizing continuous testing of the volume of the long-term flow refueling process.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of a fuel dispenser metering accuracy testing device according to an embodiment of the present invention; Figure 2 This is an internal sectional view of the tank in a fuel dispenser metering accuracy testing device according to an embodiment of the present invention; Figure 3This is a schematic diagram of the static stability test component in a fuel dispenser metering accuracy testing device according to an embodiment of the present invention; Figure 4 This is an exploded view of the static stability test component in the fuel dispenser metering accuracy test device proposed in an embodiment of the present invention; Figure 5 This is a schematic diagram of the positioning component in a fuel dispenser metering accuracy testing device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the metering mechanism in a fuel dispenser metering accuracy testing device according to an embodiment of the present invention; Figure 7 This is a structural diagram of the dynamic stability testing component in a fuel dispenser metering accuracy testing device according to an embodiment of the present invention; As shown in the figure: 1. First test tank; 2. Second test tank; 3. Connecting channel; 4. Output pipe; 5. Fuel dispenser pipe; 6. Static stability test assembly; 7. Metering mechanism; 8. Dynamic stability test assembly; 9. Sinking channel; 10. Regulating valve; 11. First lifting hole; 12. Second lifting hole; 13. Marking line; 14. Fixed pipe; 15. Positioning assembly; 16. Lifting sleeve; 17. Slide groove; 18. Magnetic suction protrusion; 19. Air outlet; 20. Conductive ring; 21. Docking hole; 22. Lifting plate; 23. Connecting plate; 24. Conductive sheet; 25. Threaded sleeve; 26. Threaded rod; 27. Floating plate; 28. Indicator rod; 29. ​​Scale line; 30. Lifting rod; 31. Magnetic suction sleeve; 32. Locking knob; 33. Linkage plate; 34. Column; 35. Spring; 36. Limit baffle; 37. Pressure sensor. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the invention, and should not be construed as limiting the invention. Rather, embodiments of the invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0022] like Figures 1 to 7As shown in the figure, an embodiment of the present invention proposes a fuel dispenser metering accuracy testing device. The accuracy testing device includes: a first test tank 1, a second test tank 2, a connecting channel 3, an output pipe 4, and a fuel dispenser pipe 5. The first test tank 1 has a connecting channel 3 on one side of its bottom, and the second test tank 2 is provided at the other end of the connecting channel 3. The interiors of the first test tank 1, the second test tank 2, and the connecting channel 3 are all interconnected. The bottom of the connecting channel 3 has an output pipe 4, and the top of the first test tank 1 has a fuel dispenser pipe 5. The fuel dispenser pipe 5 is used to connect to the fuel dispenser equipment. The output pipe 4 is used to discharge the oil inside the first test tank 1, the second test tank 2, and the connecting channel 3. The accuracy testing device further includes: a static stability testing component 6, a dynamic stability testing component 8, and a measuring mechanism 7. The measuring mechanism 7 is installed inside the second test tank 2. The top of the measuring mechanism 7 is provided with the dynamic stability testing component 8. The top of the second test tank 2 is provided with the static stability testing component 6. The static stability testing component 6 is used to discharge the air inside the second test tank 2 to the outside.

[0023] This fuel dispenser metering accuracy testing device is used to test the accuracy of the final discharge volume during the fuel dispenser refueling process. It can also test the stability of oil flow during static testing and the stability of oil flow during dynamic continuous refueling.

[0024] In use, the fuel dispenser is connected to the top of the first test tank 1 via the fuel dispenser pipe 5. For static volume measurement and stability testing, the regulating valve 10 on the bottom output pipe 4 needs to be closed. Then, the fuel dispenser is started, and the total amount of fuel injected for testing is set. During the test, by adjusting the two positioning mechanisms in the static stabilization component, the conductive ring 20 on the lifting sleeve 16 is positioned between the two conductive plates 24. During subsequent fuel injection, an electrical signal is triggered based on whether the conductive ring 20 is in contact with either of the conductive plates 24, thus determining whether the fuel injection is within the set stable range. After all fuel has been injected, the final volume is read via the indicator rod 28 on the top, achieving the purpose of volume measurement for the fuel dispenser.

[0025] When conducting dynamic testing, the bottom output pipe 4 needs to be opened, and the output flow rate needs to be adjusted by the regulating valve 10 to keep it consistent with the injection flow rate of the fuel dispenser. At this time, the dynamic stability test component 8 at the top is used to check whether the injection and output are in a balanced state, and this test process can be carried out continuously without time limit.

[0026] In this embodiment, the top of the second test tank 2 is provided with a first lifting hole 11, a second lifting hole 12 and a marking line 13. The top of the second test tank 2 is marked with a marking line 13. The top of the second test tank 2 is also provided with a first lifting hole 11 and a second lifting hole 12. The end of the marking line 13 is connected to the side of the first lifting hole 11. The first lifting hole 11 and the second lifting hole 12 are both used for the top of the measuring mechanism 7 to pass through the top of the second test tank 2 upwards.

[0027] The bottom of the connecting channel 3 is provided with an output pipe 4, a sinking channel 9 and a regulating valve 10. The top of the sinking channel 9 is provided with an opening, and the sinking channel 9 is connected to the interior of the connecting channel 3 through the opening at the top. The front end of the sinking channel 9 is connected to the output pipe 4, and the surface of the output pipe 4 is equipped with a regulating valve 10. The regulating valve 10 is used to regulate the flow rate of the oil inside the output pipe 4.

[0028] The measuring mechanism 7 includes: The floating plate 27 includes an indicator rod 28, a scale line 29, and a lifting rod 30. The top of the floating plate 27 is provided with the indicator rod 28 and the lifting rod 30. The surface of the lifting rod 30 is fitted with a dynamic stability test component 8. The surface of the indicator rod 28 is engraved with the scale line 29. The indicator rod 28 extends upward from the inside of the first lifting hole 11. The marking line 13 is used to align with the scale line 29. The lifting rod 30 is used to pass upward from the inside of the second lifting hole 12, and the top of both the indicator rod 28 and the lifting rod 30 are provided with an outwardly protruding limiting structure. The floating plate 27 has an overall rectangular structure, and the side of the floating plate 27 is attached to the inner wall of the second test tank 2. The floating plate 27 floats on the bottom oil.

[0029] The first test tank 1 and the second test tank 2 can drive the inner measuring mechanism 7 to move up and down. During the up and down movement, the volume of the injected oil can be measured by the indicator rod 28 on the top. The test process can always be read stably, reducing the shaking amplitude and making the measurement process more reliable and accurate.

[0030] Specifically, after the test oil is delivered to the inside of the first test tank 1 through the fuel dispenser pipe 5, it will directly enter the inside of the second test tank 2 through the bottom connecting channel 3. The oil will drive the floating plate 27 to move upward, and the floating plate 27 will directly drive the indicator rod 28 and the lifting rod 30 on the surface to rise. Since the indicator rod 28 and the lifting rod 30 pass through the inside of the first lifting hole 11 and the second lifting hole 12 respectively, the indicator rod 28 and the lifting rod 30 can also provide a stable guiding function for the floating plate 27 in the opposite direction. After all the metered oil has been injected, the final injected oil volume can be obtained by reading the corresponding position of the top mark line 13 and the scale line 29 on the indicator rod 28.

[0031] In this embodiment, the dynamic stability test component 8 includes: The magnetic sleeve 31, locking knob 32, and linkage plate 33 are provided. The linkage plate 33 is integrally formed on the side of the magnetic sleeve 31. The locking knob 32 is inserted into the side of the magnetic sleeve 31. The magnetic sleeve 31 is sleeved on the surface of the lifting rod 30. The end of the locking knob 32 is used to abut against the surface of the lifting rod 30. The inner wall of the magnetic sleeve 31 is attracted and adhered to the surface of the lifting rod 30.

[0032] The dynamic stability testing component 8 also includes: The system includes a column 34, a spring 35, a limiting baffle 36, and a pressure sensor 37. The pressure sensor 37 is mounted on the top of the column 34, and the limiting baffle 36 is provided on the top of the pressure sensor 37. The spring 35 is sleeved on the surface of the column 34, and the top of the spring 35 rests against the bottom of the pressure sensor 37. The bottom of the spring 35 is welded and fixed to the surface of the linkage plate 33. The bottom of the column 34 is fixed to the surface of the second test tank 2, and the column 34 and the lifting rod 30 are kept parallel to each other.

[0033] The lifting rod 30 drives the magnetic sleeve 31 to move up and down synchronously through the magnetic attraction effect or the locking effect of the locking knob 32. The magnetic sleeve 31, together with the linkage plate 33, is used to control the spring 35 to compress or stretch. The spring 35 applies pressure or pulls the pressure sensor 37 part by compressing or stretching itself.

[0034] A dynamic testing component is also installed at the top of the metering mechanism 7. Together with the output pipe 4 at the bottom and the regulating valve 10, the injected oil can be directly set to the same inflow speed for discharge. At this time, the dynamic stability testing component 8 can still determine whether the current oil injection speed of the fuel dispenser is always stable, thereby realizing continuous testing of the volume of the long-term flow refueling process.

[0035] Specifically, during dynamic stability testing, the fuel dispenser pipeline 5 is first opened, and fuel is injected into the first test tank 1 and the second test tank 2 until the floating plate 27 floats. Then, the bottom output pipeline 4 is opened, and the output flow rate is adjusted by the regulating valve 10 to match the injection flow rate of the fuel dispenser. Initially, the magnetic sleeve 31 and the lifting rod 30 are directly locked together using the locking knob 32. At this time, fuel is continuously injected and output, while the floating plate 27 remains floating. Therefore, by determining whether the floating plate 27 remains at a fixed height, the stability test can be performed. To determine whether the injection speed of the fuel dispenser is consistent with that of the output pipe 4, dynamic testing can be performed continuously. When the injection speed of the fuel dispenser is unstable, the floating plate 27 will move up or down. This will cause the lifting rod 30 to work with the locking knob 32 to drive the magnetic sleeve 31 to move up and down synchronously. This will then drive the spring 35 at the end of the linkage plate 33 to change the pressure on the pressure sensor 37. Finally, the stability of the fuel dispenser's injection process can be determined by whether the value of the pressure sensor 37 changes and the degree of change. This test process can be carried out continuously without time limit.

[0036] In this embodiment, the static stability test component 6 includes: The system includes a fixed pipe 14, a positioning component 15, and a lifting sleeve 16. The fixed pipe 14 is installed at the top of the second test tank 2. The top of the fixed pipe 14 is fitted with a lifting sleeve 16. The side of the fixed pipe 14 is fitted with a positioning component 15. The positioning component 15 is in contact with the surface of the fixed pipe 14. There are two positioning components 15, which are located on both sides of the fixed pipe 14 and have different heights. The fixed pipe 14 has grooves 17 on both sides, and magnetic convex plates 18 are integrally formed on the side of the fixed pipe 14. The fixed pipe 14 has an air outlet 19 at the top. The grooves 17 are symmetrically arranged on both sides of the fixed pipe 14. The magnetic convex plates 18 are used to provide support and adsorption for the lifting sleeve 16.

[0037] The positioning component 15 includes: The lifting plate 22 comprises a lifting plate 22, a connecting plate 23, a conductive sheet 24, a threaded sleeve 25, and a threaded rod 26. One end of the lifting plate 22 is integrally formed with the connecting plate 23. The top of the connecting plate 23 is provided with the conductive sheet 24. The surface of the lifting plate 22 is provided with the threaded sleeve 25, and the threaded rod 26 is inserted into the inner side of the threaded sleeve 25. The lifting plate 22 and the connecting plate 23 are kept perpendicular to each other. The conductive sheet 24 has an overall arc-shaped structure and moves up and down along the inside of the slide groove 17. The bottom end of the threaded rod 26 is movably connected to the surface of the second test tank 2 through a bearing.

[0038] The lifting sleeve 16 has a docking hole 21 on its surface and a conductive ring 20 is embedded in the inner wall of the lifting sleeve 16. The docking holes 21 are evenly distributed around the surface of the lifting sleeve 16. The bottom of the lifting sleeve 16 is open and the top of the lifting sleeve 16 is closed. The conductive ring 20 is used to contact two conductive plates 24. The fixed pipe 14 is used to guide the air inside the second test tank 2 toward the air outlet 19 and the docking hole 21.

[0039] By setting up a first test tank 1 and a second test tank 2, together with the static test component on top, the air inside the first test tank 1 can be blown upwards from the top of the static test component during the test. Through the set conductive structure, the stability of the exhaust airflow can be obtained, thereby indirectly measuring the stability of the flow rate of the oil injected into the fuel dispenser pipeline 5 during the volume measurement process, making the test more comprehensive.

[0040] Specifically, as the fuel dispenser injects fuel, the floating plate 27 moves upward, pushing the air inside the second test tank towards the top. The air is then discharged from the top air outlet 19 of the fixed pipe 14, lifting the lifting sleeve 16. When the fuel dispenser injects fuel that is unstable, the rising speed of the floating plate 27 will change. Whether it is accelerating or decelerating, the lifting sleeve 16 will not be able to float at a fixed height.

[0041] The increased gas flow rate will cause the lifting sleeve 16 to rise further, eventually causing the conductive ring 20 to contact the high-position conductive plate 24, generating a first type of electrical signal. At this point, it can be determined that the current fuel dispenser injection rate has increased. A decrease in the exhaust gas velocity causes the lifting sleeve 16 to move downwards, eventually leading to contact between the conductive ring 20 and the lower conductive plate 24, generating a second type of electrical signal. At this point, it can be determined that the current fuel dispenser injection rate has decreased. Simultaneously, by controlling the two threaded rods 26, the height of the two conductive plates 24 can be adjusted, thereby regulating the sensitivity of the fuel dispenser injection stability detection.

[0042] During the static test, by locking the locking knob 32 to the locked state between the magnetic sleeve 31 and the lifting rod 30, a fixed pressure can be applied to the pressure sensor 37 synchronously through the magnetic attraction effect and the spring 35. This pressure will change synchronously with the speed of the floating plate 27. Therefore, whether the value of the pressure sensor 37 changes can also be used as an auxiliary verification method to verify the test results of the static stability test component 6.

[0043] In this embodiment, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0044] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0045] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A device for testing the metering accuracy of a fuel dispenser, characterized in that, The accuracy testing device includes: a first test tank (1), a second test tank (2), a connecting channel (3), an output pipe (4), and a fuel dispenser pipe (5). The first test tank (1) has a connecting channel (3) on one side of its bottom, and the second test tank (2) is provided at the other end of the connecting channel (3). The interiors of the first test tank (1), the second test tank (2), and the connecting channel (3) are all interconnected. The bottom of the connecting channel (3) has an output pipe (4), and the top of the first test tank (1) has a fuel dispenser pipe (5). The fuel dispenser pipe (5) is used to connect to the fuel dispenser equipment. The output pipe (4) is used to discharge the oil inside the first test tank (1), the second test tank (2), and the connecting channel (3). The accuracy testing device further includes: a static stability testing component (6), a dynamic stability testing component (8), and a measuring mechanism (7). The measuring mechanism (7) is installed inside the second test tank (2). The top of the measuring mechanism (7) is provided with the dynamic stability testing component (8), and the top of the second test tank (2) is provided with the static stability testing component (6). The static stability testing component (6) is used to discharge the air inside the second test tank (2) to the outside.

2. The fuel dispenser metering accuracy testing device according to claim 1, characterized in that, The top of the second test tank (2) is provided with a first lifting hole (11), a second lifting hole (12) and a marking line (13). The top of the second test tank (2) is marked with a marking line (13). The top of the second test tank (2) is also provided with a first lifting hole (11) and a second lifting hole (12). The end of the marking line (13) is connected to the side of the first lifting hole (11). The first lifting hole (11) and the second lifting hole (12) are both used for the top of the measuring mechanism (7) to pass through the top of the second test tank (2) upwards.

3. The fuel dispenser metering accuracy testing device according to claim 2, characterized in that, The bottom of the connecting channel (3) is provided with an output pipe (4), a sinking channel (9) and a regulating valve (10). The top of the sinking channel (9) is provided with an opening, and the sinking channel (9) is connected to the interior of the connecting channel (3) through the opening at the top. The front end of the sinking channel (9) is connected to the output pipe (4), and the surface of the output pipe (4) is equipped with a regulating valve (10). The regulating valve (10) is used to regulate the flow rate of the oil inside the output pipe (4).

4. The fuel dispenser metering accuracy testing device according to claim 2, characterized in that, The measuring device (7) includes: The floating plate (27), indicator rod (28), scale line (29) and lifting rod (30) are provided at the top of the floating plate (27). The lifting rod (30) is fitted with a dynamic stability test component (8). The scale line (29) is printed on the surface of the indicator rod (28). The indicator rod (28) extends upward from the inside of the first lifting hole (11). The marking line (13) is used to align with the scale line (29). The lifting rod (30) is used to pass through the inside of the second lifting hole (12) upwards, and the top of the indicator rod (28) and the lifting rod (30) are both provided with an outwardly protruding limiting structure. The floating plate (27) is rectangular in shape, and the side of the floating plate (27) is attached to the inner wall of the second test tank (2). The floating plate (27) floats on the bottom oil.

5. The fuel dispenser metering accuracy testing device according to claim 4, characterized in that, The dynamic stability test component (8) includes: The magnetic sleeve (31), locking knob (32) and linkage plate (33) are integrated on the side of the magnetic sleeve (31). The locking knob (32) is inserted into the side of the magnetic sleeve (31). The magnetic sleeve (31) is sleeved on the surface of the lifting rod (30). The end of the locking knob (32) is used to abut against the surface of the lifting rod (30). The inner wall of the magnetic sleeve (31) is attracted and adhered to the surface of the lifting rod (30).

6. The fuel dispenser metering accuracy testing device according to claim 5, characterized in that, The dynamic stability test component (8) also includes: The column (34), spring (35), limit baffle (36) and pressure sensor (37) are provided. The pressure sensor (37) is installed at the top of the column (34). The limit baffle (36) is provided at the top of the pressure sensor (37). The spring (35) is sleeved on the surface of the column (34). The top of the spring (35) abuts against the bottom of the pressure sensor (37). The bottom of the spring (35) is welded and fixed to the surface of the linkage plate (33). The bottom of the column (34) is fixed to the surface of the second test tank (2). The column (34) and the lifting rod (30) are kept parallel to each other.

7. The fuel dispenser metering accuracy testing device according to claim 6, characterized in that, The lifting rod (30) drives the magnetic sleeve (31) to move up and down synchronously through the magnetic attraction effect or the locking effect of the locking knob (32). The magnetic sleeve (31) works with the linkage plate (33) to control the spring (35) to compress or stretch. The spring (35) applies pressure or pulls the pressure sensor (37) part by compressing or stretching itself.

8. The fuel dispenser metering accuracy testing device according to claim 2, characterized in that, The static stability test component (6) includes: The fixed pipe (14), positioning component (15) and lifting sleeve (16) are installed on the top of the second test tank (2). The top of the fixed pipe (14) is fitted with a lifting sleeve (16). The side of the fixed pipe (14) is fitted with a positioning component (15). The positioning component (15) is in contact with the surface of the fixed pipe (14). There are two positioning components (15). The two positioning components (15) are set on both sides of the fixed pipe (14) and the two positioning components (15) are at different heights. The fixed pipe (14) has grooves (17) on both sides, and magnetic convex plates (18) are integrally formed on the side of the fixed pipe (14). The fixed pipe (14) has an air outlet (19) at the top. The grooves (17) are symmetrically arranged on both sides of the fixed pipe (14). The magnetic convex plates (18) are used to provide support and adsorption for the lifting sleeve (16).

9. The fuel dispenser metering accuracy testing device according to claim 8, characterized in that, The positioning component (15) includes: The lifting plate (22), connecting plate (23), conductive sheet (24), threaded sleeve (25) and threaded rod (26) are integrally formed at one end of the lifting plate (22). The top of the connecting plate (23) is provided with conductive sheet (24). The surface of the lifting plate (22) is provided with threaded sleeve (25). The inner side of the threaded sleeve (25) is inserted with threaded rod (26). The lifting plate (22) and the connecting plate (23) are kept perpendicular to each other. The conductive sheet (24) has an arc-shaped structure and moves up and down along the inside of the slide groove (17). The bottom end of the threaded rod (26) is movably connected to the surface of the second test tank (2) through a bearing.

10. The fuel dispenser metering accuracy testing device according to claim 9, characterized in that, The lifting sleeve (16) has a docking hole (21) on its surface. A conductive ring (20) is embedded in the inner wall of the lifting sleeve (16). The docking hole (21) is evenly distributed around the surface of the lifting sleeve (16). The bottom of the lifting sleeve (16) is open and the top of the lifting sleeve (16) is closed. The conductive ring (20) is used to contact the two conductive plates (24). The fixed pipe (14) is used to guide the air inside the second test tank (2) toward the air outlet (19) and the docking hole (21).

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